Modular block wall



FIG. 1 is a perspective view of a modular block wall showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view of the left side thereof, the opposite side being a mirror image thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a modular block wall as shown and described. 